The Pentateuch.
The Christian Bible is written in Hebrew, Aramaic, and Greek.
The original Hebrew Bible that became the Old Testament was written in Hebrew and Aramaic. The Christian New Testament books of the Bible were written in Greek.
The difference is the word Torah is the Hebrew name for the first 5 books of Moses which is referred to as "The Law" and Pentateuch is a Greek word for the first five books of the Hebrew Bible. In essence they're the same.
This question has two possible answers. The reason is that the first five Hebrew books of the Bible are not refered to as the "gospel." Only the part of the Bible that gives the accounts of the minstry of Jesus is called the gospels. The first five books of the Bible was called the Pentateuch. That refers to the first five books of the "Old Testiment," or "Hebrew Scriptures" that were written by Moses in the Hebrew language. The part of the Bible that is normally referred to as the gospels, that is, the minstry of Jesus, are the first four books of the "New Testiment," or "Greek Scriptures." This is the books of Matthew, Mark, Luke, and John.
The 66 books of the Protestant Bible were originally written in Hebrew, Aramaic, and Greek. The Old Testament was primarily written in Hebrew, with some portions in Aramaic, while the New Testament was written entirely in Greek.
The Bible as is commonly held today had as its originating manuscripts languages of Hebrew, Aramaic, and Greek. The original Hebrew "Bible" was the Pentateuch, or what we refer to as the first five books of the Bible written by Moses, I.e., Genesis, Exodus, Leviticus, Numbers, and Deuteronomy. Later Christian scholars added all of the Old Testament books, from Joshua through Malachi, and the New Testament books, from Matthew through Revelation.
The first five books of the Bible are called "The Five books of Moses" which are a.k.a. " The Books of the Law" and they are also called "The Pentateuch", Greek term meaning "pente (5) teuchos (volumes)," and also called the "Torah" (a Hebrew word that means "instruction").
Septuagint, the Greek version of the Hebrew Bible. It was the basis for Jerome's Latin translation of the Bible.
The Greek canon added 8 books to the Old Testament canon. These books, known as the Deuterocanonical books, are not present in the Hebrew Bible but are included in the Greek Septuagint and Catholic Bibles.
There are no books called "letters" (or epistles) in the Hebrew Old Testament. All books that are designated as "letters" are Greek, and found in the New Testament.
66 all together.39 in the Hebrew Scriptures27 in the Christian Greek Scriptures
Most of the books of the Hebrew Bible were written in Hebrew (עברית), with the exception of the books of Daniel and Ezra which were written in Jewish Aramaic (ארמית), a language very closely related to Hebrew. The books of the New Testament were written entirely in Koine Greek (Ελληνιστική Κοινή).